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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script>
        // 不要使用name作为变量名
        var age = 18;
        address = '火影';
        gz = '20000';
        alert(age);
    </script>

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<body>

</body>

</html>